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<br />RIO GRANDE COMPACT COMMISSION REPORT
<br />
<br />52
<br />
<br />EVAPORATION AND PRECIPITATION
<br />
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<br />...:.;
<br />
<br />The last paragraph of Article VI of the Compact states, in part. --- "such credits and
<br />debits shall be reduced annually to compensate for evaporation losses in the proportion that
<br />such credits or debits bear to the total amount of water in such reservoirs during the year,"
<br />To provide the data needed for the computation of such evaporation losses, the Commission
<br />has encouraged the establishment and operation of evaporation stations near each major reservoir
<br />in the basin and at other selected locations.
<br />
<br />Evaporation and other climatological data colleoted at the several stations in Colorado
<br />and New Mexico are tabulated on the next page. At some of the stations, it was not possible to
<br />obtain evaporation records throughout the winter period.
<br />
<br />The measurements of evaporation were made in accordance with standard practice for the
<br />type of pan in use. Measurements of precipitation were made in standard a-inch rain gages,
<br />which were supplemented at some of the stations by recording rain gages.
<br />Records for the evaporation stations at the State University, Elephant Butte Dam, and
<br />El Vado Dam antedated the creation of the Commission; the station at Bosque del Apache was
<br />established for t?e U.S. Fish and Wildlife Service; the stations at Abiquiu Dam, Cochiti Dam,
<br />and Jemez Canyon Dam were established by the Corps of Engineers. All others were established
<br />at the request of the Commission.
<br />
<br />The Rio Grande Compact Commission gratefully acknowledges the cooperation of the U. S.
<br />Environmental Science Services Administration, U.S! Corps of Engineers, and U.S. Bureau of
<br />Reclamation for furnishing the climatological records contained in this veport.
<br />
<br />Alamosa Airport.--Lat 370271) long 105052", in Alamosa County at airport near AlamoSa, Colo.
<br />Standard class A pan, anemometer, maximum and rnini~um thermometers, standard 8-inch and
<br />recording rain gages at elevation 7,536 ft.
<br />Platoro Dam.--Lat 370211, long 106030', in Conejos county near Platoro) Colo. Standard class
<br />A pan, anemometer, maximum and minimum thermometers, fan type psychrometer, standard
<br />8-inch and recording rain gages at elevation 9,820 ft. Records furnished by Bureau of
<br />Reclamation.
<br />EI Vado Dam.--Lat 36D361, long 106D4~', in Rio Arriba County at El Vade Da~ near Tierra
<br />Amarll1a, N. Mex. Standard class A pan, anemometer, maximum and F.dnimurn thermometers,
<br />standard 8-inch and recording rain gages at elevation 6)750 ft.
<br />AbiquiU Dam.--Lat 36014', long 106026', in Rio Arriba County at Abiquiu Dan near Abiquiu,
<br />N. Mex. Standard class A pan, maxi~um and minimum thermometers, standard 8-inch and
<br />recording rain gages at elevation 6,380 ft.
<br />Santa Fe Colle~e.--Lat 35D39', long 1050581) in Santa Fe, N. Mex. Standard class A pan,
<br />anemometer, maximum and minimum thermometers, standard 8-inch and recording rain gages
<br />at elevation 6,800 ft.
<br />cochiti Dam.--Lat 35038", long 106019", in Sandoval County at operations building, at Cochiti
<br />Damsite, N. Mex. Standard class A pan, anemometer, maximum and minimum thermometers,
<br />standard 8-inch and recording rain gages at elevation 5,560 ft.
<br />Jemez Dam.--Lat 35023', long 106032", in Sandoval County at Jemez Dam, N. Mex. Standard class
<br />A pan, anemometer, maximum and minimum thermometers, standard 8-inch and recording rain
<br />gages at elevation 5,388'ft.
<br />
<br />Bosque del Apache.--Lat 33046", long 106054', in Socorro County, 7 mjles south of San Antonio,
<br />N. Mex. Standard class A pan, anemometer, maximum and minimum thermometers, standard 8-inch
<br />and recording rain gages at elevation 4,520 ft.
<br />
<br />Elephant Butte Dam.--Lat 33009', long 1070111, in Sierra county at Elephant Eutte Dam, K. Mex.
<br />Standard class A pan, anemometer, maximum and mimimum thermor.leters, and standard 8-inch
<br />rain gage at elevation 4,576 ft.
<br />
<br />Caballo Dam.--Lat 3205~', long 107018', in Sierra County at Caballo Dam, N. Mex. Standard class
<br />A pan, anemometer, maximum and minimum thermometers, standard 8-inch and recording rain gages
<br />at elevation 4,190 ft.
<br />
<br />New Mexico State University.--Lat 320171, long 106045', in Dona Ana county at University Park)
<br />N. Mex. Standard class A pan, anemometer, maxiffium and cinimum thermometers, standard 8-inch
<br />and recording rain gage~ at elevation 3,881 ft.
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